Add window open and close delegate methods to CWVUIDelegate.

ios/web_view/public/cwv_navigation_action.h

Index: ios/web_view/public/cwv_navigation_action.h
diff --git a/ios/web_view/public/cwv_navigation_action.h b/ios/web_view/public/cwv_navigation_action.h
new file mode 100644
index 0000000000000000000000000000000000000000..551a27dd337425c4c08d2791c8ea14f17e013ea9
--- /dev/null
+++ b/ios/web_view/public/cwv_navigation_action.h
@@ -0,0 +1,20 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_WEB_VIEW_PUBLIC_CWV_NAVIGATION_ACTION_H_
+#define IOS_WEB_VIEW_PUBLIC_CWV_NAVIGATION_ACTION_H_
+
+#import <Foundation/Foundation.h>
+

[Eugene But (OOO till 7-30), 2017/03/16 17:09:02]

Do you want to use nullability annotation?

[michaeldo, 2017/03/16 18:24:28]

yes, thank you for reminder.

+// Encapsulates information about an action which caused a navigation.
+@interface CWVNavigationAction : NSObject
+
+// Destination request associated with the action.
+@property(copy, readonly) NSURLRequest* request;

[Eugene But (OOO till 7-30), 2017/03/16 17:09:03]

nonatomic

[michaeldo, 2017/03/16 18:24:28]

Done.

+// YES if the action was caused by a user action (e.g. link tap).
+@property(readonly) BOOL userInitiated;

[Eugene But (OOO till 7-30), 2017/03/16 17:09:02]

@property(nonatomic, readonly, getter=isUserInitiated) BOOL userInitiated;

[michaeldo, 2017/03/16 18:24:28]

Done.

+
+@end
+
+#endif  // IOS_WEB_VIEW_PUBLIC_CWV_NAVIGATION_ACTION_H_